RHEL 8 : kpatch-patch (RHSA-2021:3044)

high Nessus Plugin ID 152444

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3044 advisory.

- kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)

- kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)

- kernel: race condition in net/can/bcm.c leads to local privilege escalation (CVE-2021-3609)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://cwe.mitre.org/data/definitions/362.html

https://cwe.mitre.org/data/definitions/787.html

https://cwe.mitre.org/data/definitions/863.html

https://access.redhat.com/security/cve/CVE-2021-3609

https://access.redhat.com/security/cve/CVE-2021-22543

https://access.redhat.com/security/cve/CVE-2021-22555

https://access.redhat.com/errata/RHSA-2021:3044

https://bugzilla.redhat.com/1965461

https://bugzilla.redhat.com/1971651

https://bugzilla.redhat.com/1980101

Plugin Details

Severity: High

ID: 152444

File Name: redhat-RHSA-2021-3044.nasl

Version: 1.8

Type: local

Agent: unix

Published: 8/11/2021

Updated: 5/9/2022

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

Risk Information

CVSS Score Source: CVE-2021-3609

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 6

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:H/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_aus:8.4, cpe:/o:redhat:rhel_e4s:8.4, cpe:/o:redhat:rhel_eus:8.4, cpe:/o:redhat:rhel_tus:8.4, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-305, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-305_10_2, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-305_3_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-305_7_1

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/10/2021

Vulnerability Publication Date: 4/20/2021

Exploitable With

Metasploit (Netfilter x_tables Heap OOB Write Privilege Escalation)

Reference Information

CVE: CVE-2021-3609, CVE-2021-22543, CVE-2021-22555

RHSA: 2021:3044

CWE: 362, 787, 863